docs: def get_uri(self, curie):
          ''' Get a URI from a CURIE '''
          if curie is None:
              return None
          parts = curie.split(':')
          if len(parts) == 1:
              if curie != '':
                  LOG.error("Not a properly formed curie: \"%s\"", curie)
              return None
          prefix = parts[0]
          if prefix in self.curie_map:
              return '%s%s' % (self.curie_map.get(prefix),
                               curie[(curie.index(':') + 1):])
          LOG.error("Curie prefix not defined for %s", curie)
          return None